JVC MXK10 - Service Manual Immediate Download

MX-K10

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

Contents

No. 21173

May.

2003

Safety precautions --------------------------- 1- 2

Important for laser products ---------------- 1- 3

Preventing static electricity ----------------- 1- 4

Disassembly method ------------------------ 1- 5

Adjustment method --------------------------- 1-18

Flow of functional

operation until TOC read -------------- 1- 20

Maintenance of laser pickup -------------- 1- 21

Replacement of laser pickup -------------- 1- 21

Description of major ICs ------------------- 1- 22

BASS-REFLEX

CD-R/RW PLAYBACK

3-CD

PLAY & EXCHANGE

ACTIVE

BASS EX.

CLOCK

/TIMER

E J E C T

R E C / P L A Y

C D S Y N C H R O R E C O R D I N G

P L A Y

F U L L - L O G I C C O N T R O L

A U X

C D

T A P E

F M

/ A M

TAPE

A / B

CD 3

CD 2

CD 1

COMPACT

COMPONENT

SYSTEM

MX-K10

1 BIT DUAL D/A

CONVERTER

PROGRAM

SOUND

MODE

REPEAT

PANDOM

PRESET

TUNING

STANDBY/ON

STANDBY

CANCEL

PHONES

MIC

MIN

MAX

MIC LEVEL

REC START

/ STOP

REC START

DUBBING

SET

/ DEMO

DIS

C S

KIP

CLASS C

FM MODE FM /AM

AUX

SLEEP

STANDBY/ON

SOUND

MODE

ACTIVE

BASS EX.

FADE

MUTING

VOLUME

PROGRAM

/RANDOM

REPEAT

TAPE

A/B

TAPE

KARAOKE

ECHO

C O M P U P L A Y C O N T R O L

CA-MXK10

SP-MXK10

Area Suffix

UT ........................ TAIWAN

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams,

the parts that are printed over with black such as the resistor (

), diode (

) and ICP (

) or identified

by the " ! " mark nearby are critical for safety.

When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.

(Except the J and C version)

1-2

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding

may be left over on some parts

of the chassis. Therefore, pay

attention to such burrs in the

case of preforming repair of

this system.

Warning

CAUTION

Good earth ground

Place this

probe on

each exposed

metal part.

AC VOLTMETER

(Having 1000

ohms/v

1500

10W

olts,

or more sensitivity)

0.15 F AC TYPE

Safety Precautions

1. This design of this product contains special hardware and many circuits and components specially or

safety purposes. For continued protection, no changes should be made to the original design unless

authorized in writing by the manufacturer. Replacement parts must be identical to those used in the

original circuits. Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the

product should not be made. Any design alterations or additions will void the manufacturer's warranty

and will further relieve the manufacture of responsibility for personal injury or property damage resulting

therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These

characteristics are often not evident from visual inspection nor can the protection afforded by them

necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.

Replacement parts which have these special safety characteristics are identified in the Parts List of

Service Manual. Electrical components having such features are identified by shading on the

schematics and by ( ! ) on the Parts List in the Service Manual. The use of a substitute replacement

which does not have the same safety characteristics as the recommended replacement parts shown in

the Parts List of Service Manual may create shock, fire, or other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be

separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention

of electric shock and fire hazard. When service is required, the original lead routing and dress should

be observed, and it should be confirmed that they have been returned to normal, after re-assembling.

5. Leakage currnet check (Electrical shock hazard testing)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the

product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.)

to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation

transformer during this check.

Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the

leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part

having a return path to the chassis, to a known good earth ground. Any leakage current must not

exceed 0.5mA AC (r.m.s.)

Alternate check method

Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or

more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-

type capacitor between an exposed metal part

and a known good earth ground. Measure the AC

voltage across the resistor with the AC voltmeter.

Move the resistor connection to each exposed

metal part, particularly any exposed metal part

having a return path to the chassis, and meausre

the AC voltage across the resistor. Now, reverse

the plug in the AC outlet and repeat each

measurement. Voltage measured Any must not

exceed 0.75 V AC(r.m.s.). This corresponds to 0.5

mA AC(r.m.s.).

MX-K10

1. CLASS 1 LASER PRODUCT

2. DANGER : Invisible laser radiation when open and

inter lock failed or defeated. Avoid direct exposure to

beam.

3. CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace

the complete Laser Unit if it malfunctions.

4. CAUTION : The compact disc player uses invisible

laser radiation and is equipped with safety switches

which prevent emission of radiation when the drawer is

open and the safety interlocks have failed or are

defeated. It is dangerous to defeat the safety switches.

1-3

Important for laser products

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

5. CAUTION : If safety switches malfunction, the laser is

able to function.

6. CAUTION : Use of controls, adjustments or performance

of procedures other than those specified herein may

result in hazardous radiation exposure.

CAUTION Please use enough caution not

to see the beam directly or touch

i t i n case of an adjustment or

operation check.

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO

: Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle. Älä

katso säteeseen.

ADVARSEL : Usynlig laserstråling ved åbning, når

sikkerhedsafbrydere er ude af funktion.

Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning, når

sikkerhetsbryteren er avslott. Unngå

utsettelse for stråling.

MX-K10

1-4

Preventing static electricity

1. Grounding to prevent damage by static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is

discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when

performing repairs.

2. About the earth processing for the destruction prevention by static electricity

In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity

of the work environment.

Be careful to use proper grounding in the area where repairs are being performed.

2-1 Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it

before placing the traverse unit (optical pickup) on it.

2-2 Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the

replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.

(Refer to the text.)

2. Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power

source can easily destroy the laser diode.

4. Handling the CD changer unit (optical pickup)

1. Do not subject the CD changer unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific

details, refer to the replacement procedure in the text.

Remove the anti-static pin when replacing the CD changer

unit. Be careful not to take too long a time when attaching it

to the connector.

3. Handle the flexible cable carefully as it may break when

subjected to strong force.

4. It is not possible to adjust the semi-fixed resistor that

adjusts the laser power. Do not turn it.

Attention when traverse unit is decomposed

* Please refer to "Disassembly method " in the text for

pick up and how to detach the CD changer mechanism.

1. Remove the CD changer unit.

2. Disconnect the harness from connector on the CD motor

board.

3. Solder is put up before the card wire is removed from connector

Cn601on the main board as shown in Fig.1 and Fig. 2.

(When the wire is removed without putting up solder, the

CD pick-up assembly might destroy.)

4. Please remove solder after connecting the card wire with

CN601 when you install picking up in the substrate.

Conductive material

(conductive sheet) or iron plate

(caption)

Anti-static wrist strap

Soldering

Fig.2

Flexible cable

Fig.1

CD changer

unit

CD changer

mechanism

assembly

MX-K10

1-5

Disassembly method

Commence disassembly of this set by removing the main units and then proceed to the components

and assemblies inside the units.

Replacement of the fuses and the power IC

Top cover

CD changer unit

Front panel assembly

Chassis unit

CD changer unit

Removing the main PCB

Removing the CD changer mechanism assembly

Removing the CD pickup

Replacing the loading motor and belt of the CD changer tray

Replacing the CD tray rotor belt of CD changer, and removing the motor

Front panel assembly

Removing the cassette deck mechanism

Removing the earphone jack PCB

Removing the control/FL PCB

Removing the switch PCB and ACTIVE BASS EX. switch PCB

Removing the cassette deck main motor, and replacing the main belts

Removing the leaf switches of the cassette deck mechanism

Removing the cassette deck heads

Chassis unit

Removing the 3-pin regulator

Removing the power amp and supply PCB and the Power Trans PCB

Removing the sub power PCB

MX-K10